有强烈迹象表明此案将被提交至上诉法院。

There are strong ___indications that the case will be referred to the Court of Appeal.

不幸的是，设备安装并插入电源后，背面冒出黑烟，在我看来这是某种故障的迹象。

Unfortunately, after the equipment was installed and plugged into the mains, black smoke came out of the back, which in my opinion is an ___indication of a failure of some sort.

她突然沉默是她隐藏某事的迹象。

Her sudden silence was an ___indication that she was hiding something.